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` H. F. NASON.

SEWING MACHINE.v No. 523,589. -PatentedJuly 24,I 1894.

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HQRNAsoNQ SEWING MAQHINEV;v '.No. 523,5897"l Patented July 2.4, 189.4.

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Hm. NASON."

SEWING MACHINE.

No. 523,589. Patented July 24,1894.

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HLP. NASON. SEWING MACHINE No'. 523x389.` Patented July 24, 1894.

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'UNITED .STATES ll*PATam* OFFICE.

HORACE F. NASON, OFNATICK, ASSIGNOR OF TWO-THIRDS T O CHARLES WHITTEMORE AND JOHN SETTS.

Q. A. WHITTEMORE, OF BOSTON, MASSACHU- SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 523,589, dated J' uly 24, 1894- APPHfafiOIl med March 13| 1893x Serial No. 465,805. (No model.)

To all whom it may concern:

.13e-it known that I, HORACE F. NASON, a citizen of the United States, and a resident of Natick, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Wax-Thread Sewing- Machlnes, of which the following, taken in connection with the accompanying drawings, 1s a specification. v

This invention relates to improvements in wax thread sewing machines and is particularly designed for the purpose of sewing soles to the'uppers of boots and shoes, for sewing the .Welt and upper together as well as for sewing and uniting other articles of leather as will hereinafter bemore fully shown and described reference being had to the accompanymg drawings, wherein- Flgure 1 represents a front elevation of the improved sewing machine; and Fig. 2 represents a rear elevation of the same. Fig. 3 represents an end elevation of the'machine. Fig. 4 represents a detail end view showing a portion of the mechanism for operating the needie` and a part of the awl feed mechanism. Fig. 5 represents a detail view of the cam and bell crank lever for raising the presser foot during the feed of the Work. Fig. 6 represents a detail view ofthe cam and lever for actuating the thread guide. Fig. 7 represen ts a detail view of the cam and lever for actu`- ating the feed of the awl. Fig. 8 represents front and rear views of the welt guide work support. Fig. 9 represents a detail view of the mechanism for imparting a rocking motion to the awl. Fig. 10 represents a vertical section showing the mechanism for imparting a rocking motion to the hooked needle. Fig. 11 represents a detail view of the needle brace disk. Fig. 12 represents a vertical section of the said needle brace disk and needle carrier; and Fig. 13 represents a vertical section of the awl carrier.

Similar letters refer to similar parts wherever they cccur on the dierent parts of the drawings. f

In the .drawings A is the frame of the machine to which is preferably bolted or otherwise secured the goose neck B as usual.

C is the rotary driving shaft having belt rear end as is common in machines of this kind. l

The machine is what is termed an awl feed machine and in its construction are used the following elements and means for their operations, namely: A curved awl having a roeking motion imparted to it for the purpose of penetrating the Work previous to the passing of the needle through said work; and in addition to said rocking motion of the awl, a lateral'motion is imparted to it while it is in the work for the purpose of feeding. A rocking needle carrier provided with a curved and hooked needle, and a rocking needle brace adapted to slide on said needle during the sewing operation. A vertically and laterally movable presser foot having a lateral motlon` imparted to it by the awl carrier support. A looper adapted to move in a circular path around the needle when the latter is in its highest position for the purpose of laying the thread in the hooked needle preparatory tothe forming'of the stitch; and means for adj ustlng the position of the looper relative to the needle. Aslack-thread controlling mechanism vand meansfor adjusting the length of the loop during the sewing operation; and a stationary work'support with ork without a Welt guide according to the nature of the work to be done.

The mechanism for operating the awl d is constructed as follows: The lcurved awl dis lattached to the awl carrier D which is journaled on a pin or stud D.(Fig. 13) secured to the upper end of the feed carriage E which is guided in lateral grooves in the front portion of the frame A.

A rocking motion is imparted to the awl and its carrier by the following mechanism: On the rotary shaft C is secured a grooved cylinder cam D which imparts a rock motion to a lever D3 pivoted at D4 to the machine frame and connected in its upper end to a link D5 the forward end of which is connected to a bell crank lever D? pivoted at D7 to the machine lframe and universally connected at its forward end to the awl carrier D by means of a ball and socket link D8 as fully shown in Fig. 1.

pulley and balance wheel C secured to its' IOO The lateral feed motion is imparted to the awl and its feed carriage E as follows: On the driving shaft C is secured a grooved face cam E which imparts a rocking motion to the lever E (Fig. 7) which is attached to a shaft E3 journaled in a bearing in the frame A and provided at its forward end with a grooved lever E4 in which is arranged a sliding block E5 (Fig. 4) journaled on a screw bolt E6 adjustably connected in a slot e on the feed carriage E as shown in Fig. 3. By adjusting the position of the bolt E6 in the slot e, the feed of the awl and consequent length of stitch is adjusted.

The mechanism for imparting a rocking motion to the curved hooked needlef is constructed 'as follows: On the driving shaft C is secured a disk F (Fig. 4.) provided with an adjustable crank F to which is pivoted a link F3 the lower end of which is adj ustably connected to a sliding bar F4 (Figs. 3 and lO) guided in a groove in the stationary front portion A of the frame of the machine. The upper end of said sliding bar F4 is pivoted to a curved link F5 the upper end of which is connected to the needle carrier F, which is journaled on a stud F6 (Fig. 12) secured to the stationary frame portion A. The curved hooked needlef is secured in a suitable manner to said needle carrier F. On said stud F6 or a hub concentric thereto on the frame portion A (Fig. 12), is pivoted the rocking needle brace carrier G having the needle brace g through which the needle is guided and supported; said needle brace carrier being rocked in one direction by a stud or projection F7 (Fig. 1l) on the needle carrier going through a curved slot G on the needle brace carrier G, and in any opposite direction by means of spring G attached in one end to said needle brace carrier G and in the opposite end to the stationary part A' of the frame of the machine.

The mechanism for operating the presser foot h is constructed as follows: On the driving shaft C is secured a grooved face cani H (Fig. 5) having two projections H', H, so as to cause the presser foot to be raised above the Work during the feed of the latter and to cause it to descendY on the work while the stitch is being made and to raise said presser foot while it is being returned to its original position. The said grooved cam H imparts a rocking motion to a bell crank lever Hf pivoted at h3 to the machine frame and having its free end connected to a link H4 the upper end of which passes loosely through the rear end of the foot lifter lever H5 and is provided with an adjustable nut h4 by means of which the lift of the presser foot is regulated.

Thelifterlever Hiispivoted ath5 to the goose neck B and its forward end is pressed downward (when liberated bythe cam I-l) by the influence of an adjustable spring H the forward end of which presses against a projection k7 on the presser foot bar H7. The forward end of the lifter lever Hf3 extends below the foot bar projection 71.7 causing If he said foot bar and its presser foot to be raised by the action 'of the cam projection H', H", during the time above specified.

The presser footbar H7 is guided in vertical bearings in the front part of the gpose neck B, and its lower end has alateral pin or stud hs passing loosely through the upper portion of the presser foot h which is guided vertically in a bracket HS which is attached to the upper part of the carriage E, and by this arrangement the presser foot is causedto fol low the lateral movement of said carriage E and the awl mounted in the upper end thereof during its vertical motion to and from the work that is being stitched.

The mechanism for guiding the lower end of the looper c' in a circular path around th'e needle when the latter is in its highest position for the purpose of laying the thread in the hooked needle preparatory to the forming of the stitch is constructed as follows: To the driving shaft C is secured a grooved face cam I (Fig. 6) which imparts a rocking motion to a lever l pivoted at Ito the machine frame; to the 4free end of the lever I is connecteda rack bar IG, the upper end of which is suitably guided in the goose neck portion B and having its teeth meshing in the teeth of a pinion I3 secured to a horizontal shaft I4 the forward end of which is adj ustably secured to a i shaft l5 by means of a coupling i4 or equivalent device for the purpose of properly adjusting the position of the looper relative to the position of the needle. The forward end `of the shaft I5 has a crank 50u which the upper end of the looper t' 'is hung, its middle portion having a projection or pin t6 suitably guided in the goose neck so as to cause a circular motion to be imparted to the lower end of said looper during the oscillatory movement of the shaft I4, l5, for the purpose stated.

The slack thread controlling mechanism consists of a vertically movable rod K located in bearings in the goose neck B, and having a guide roller 7a in its lower end over which the thread .L (Fig. l) is carried.

0n the rod K is arranged a pair of adj ust-` able collars K and K", and between the latter and lower portion of the goose neck B is arranged on the rod 'K, a preferably spiral spring K3 against the influence of which the rod K is drawn downward during the downward passage of the needle to form the loop the tension on the thread being adjusted by the position of the collar K on the rod K.

The upper adjustable collar K serves to limit the upward motion of the rod K for ad justing the length of loop during the sewing operation, which is accomplished by said collar coming in contact with the upper part of the goose neck bythe action of the spring K3. The work support M shown in Figs. 1, 2 and 3 is stationary and secured to the front portion A of the machine frame and is of the usual kind adapted for sewing turned slices.

IOO

IIO

in Fig. 8 is substituted for the one shown in Figs.. 1, 2 and 3 as is common in machines of I this kind.

The machine is to be provided with the usual tension and wax heating devices but as such form no part of my present invention, they are not represented in the drawings.

The operation of the machine is as follows: The presser foot is iirst raised as usual by depressing the lifter lever; the work is' then placed on the work support, and presser foot located in the channel of the shoe; the awl enters and penetrates the work and feeds while in the work during the feed, the presser foot is raised; when the awl recedes from the Work it is in position directly above the needle. After the awl has passed out of the Work the hooked needle ascends through the hole made by the awl and when the needle is in its upper position it receives the thread from the thread guide after which the needie, carrying vthe looped thread, is drawn through the work at the same time as the awl is returned to its original position, as is also the presser foot which is raised during the downward motion of the needle. The awl again enters and feeds the work and the needle ascends and forms a chain stitch as usual. n

Having thus fully described the nature, construction, and operation of my invention, I-

wish to secure by Letters Patent and claim- 1. In a waxthread sewing-machine, the combination with a curved needle and a looper, 4

of a feed-carriage E, a grooved face-cam E mounted on the drive-shaft, a rock-shaft EB operated by said cam and having rigidly secured to its forward end a grooved lever E4, a sliding-block E5 arranged to slide in said grooved lever and journaled on a screw-bolt l E6 adjustably connected in a slot e formed in the carriage E, the awl-carrier D carrying the awl d and journaled on the feed-carriage, a

cam D mounted on the drive-shaft, a pivoted lever D3 at one Aend engaging said cam and at its opposite end connected to a bell-crank D6 by a link D5, and an upright arm D8 universally connected at one end to said crank and at its opposite end connected to the awlcarrier, substantially as described.

2. In a wax-thread sewing-machine, the combination with a curved rocking-awl, of an oscillating needle-carrier F journaled on a stud F5 fixed on the stationary frame portion A and carrying a curved hooked needle, the disk F mounted on the drive-shaft and provided with an adjustable crank F apitman F3 secured at one end to said crank and at its other end connected to a sliding-bar F4 sliding in a straight vertical groove in the stationary front portion of the frame of the machine, and the curved link F5 pivoted at one lend to the rear face of the bar F4 and at its other end to the needle-carrier, substantially as described.

3. In a wax thread sewing machine, the combination of the drivingshaft, the camI mounted thereon, the pivoted lever I oscillated by said cam, the rack bar I5 connected at one end to the lever l and at its other end engaging a pinion I5 secured to a horizontaLtwopart shaft l5, I4, adj ustably secured together by a coupling 4, a crank 'i5 secured to the forward end of the shaft I5, and a thread guide t' connected at its upper end to the crank and intermediate its ends provided with a projecting pin 5 suitably guided in the goose neck of the machine, substantially as described.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 24th day of February, A. D. 1893.

HORACE F. NASON.

Witnesses:

ALBAN ANDREN, LAURITZ N. MLLER. 

